Reinforcing-bushing for cores.



T. ELIXMAN.

REINFORCING BUSHING FOR CORES. I

APPLICATION FILED FEB.27. 1912.

1,1 37,4?@; I I Patented Apr. 27, 1915.

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REINFORCING-BUSHING FOB COBES.

Specification of Letters Patent.

Applieationfiled February 27, 1912. Serial No. 680,279.

'full, clear, and exact specification.

This invention relates to manufacture of cores for winding paper in rolls and con- "sists in devising the hereinafter more fully described reinforcing bushings for such cores and in the manner of applying said bushto the ends of the cores.

anufactured paper is wound in rolls of such size as required upon cores provided for this purpose. The cores for such paper rolls are preferably made of tough paper, wound and cemented upon itself under great pressure, to produce a hollow cylinder, and

the ends engaging with the drivingdogs or keys, are reinforced by metallic rings of various constructions, to withstand the strain exerted thereon by the winding of the paper roll, and also the rough handling, to which they are subjected. These rings were heretofore made of two or more parts of cast metal, combined in various ways, and the mounting thereof upon cores required to reduce their ends so excessively, that they could not withstand the strain, and were rapidly wrung off, whereby the cores were rendered useless. v

Having ascertained by tests and observation in the manufacture and use of such cores for paper rolls, that the main elements of the serviceability'and durability of a core.

depends mainly upon'a close fitting of the bushing, and a. firm fastening means of the bushing upon the core, and not upon the weight or thickness of the metal used in the bushing; that several of the features of such bushings, as were heretofore constructed or. cast metal, may be dispensed with, if the bushing is made of one piece, and that for the intended use of a core, the bushing should be constructed so as to not require any considerable reduction of the ends of the core when mounted thereon, I have devised the improved bushing for paper cores shown in the accompanying drawing, wherem Figure 1 is a plan view, and Fig. 2 a bottom view of my improved bushing; Fig. 3

is a sectional view thereof on line 3''-3.indi- Patented Apr-.27, 1915.

cated in Fig. 1; Fig. 4 isa longitudinal sec- The bushings b is made ofone piece of cold sheet metal, preferablysteel, drawn and rolled into a shell, shaped to conform to the.

hollow cylindrical body of the core, as shown in Figs. -1,' 2 and 3, andhaving the same interior and exterior dimensions as the core.

The interior wall c.of the bushing (see Fi 3) .is concentrical with the exterior wall and the flange e is beveled toward the interior wall a, and rounded at the corners, to

avoid overstraining and the resulting cracking of the material in the drawing and rolling process of its manufacture. After the shell of the bushing is thus formed, the notch f is cut therein, and the holes for rivets g drilled and reamed for countersinking the rivet heads. Then the bushing is ready to be applied to the core.

The described form of the bushing, and the .manner of producing it, nable me to make it of sheet metal, preferably soft steel, which need not be thicker than the aggregate of two layers of the sheet of paper, of which the core is made, and yet to produce a bushing amply strong 'to withstand the strain, exerted upon it in the use of the core. This is of great importance and very advantageous, in that the ends of the core need not be so reduced as necessary, to secure thereon such bushings or driving rings as were in use heretofore.

To place the bushing 6 upon the core a, made of a sheet of tough paper, as explained, circumferential incisions z' are made into the core, interiorly and exteriorly, and equidistantly from its end, at a distance corre sponding to the width of the bushing I). These incisions are made to a depth corresponding to the thickness of the walls 0 and d of the bushing, through about two layers of the paper, and then the strips are peeled ofl. Nextthe interior edges of the core ends are beveled, as shown at h in Fig. 4, and' the core, and the holes for the'rivets drilled through Finally the rivets g are set in, from the inside, and drawn y spreading their outwardly projecting ends by hammering, whereby the bushings are firmly secured on the core. The spread ends-of the rivets are filed flush with the bushing to make its surface smooth and even.

Paper cores made as herein set forth, and provided with such bushings as herein shown and described, are uniform in diameter throughout their entire length, smooth and light; they add a very smallproportion to the weight of the paper roll, are much more convenient to handle, and do not produce any malformation of the roll, or cause any crumpling of the paper. The cores are practically indestructible, much stronger and durable than any heretofore known and less expensive.

I claim as my invention:

Arp'aper core for winding paper in rolls,

comprising a hollow cylindrical body and hollow caps, affixed thereon, one on each end thereof and conformingtherewith in shape and in the interior and exterior diameters: the said caps being drawn -and rolled of one piece of sheet metal, uniformly thick throughout, each cap comprising an inner and an outer ring connected by a rim integral therewith; and notches cut through the rim, the inner and the outer rings, and through the ends of the core, the notches being adapted to engage with a pin to connect the core with a driven shaft; substantially as herein shown and described.

THEODORE ELIXMAN. Witnesses:

VERONICA BRAUN, R. A. PIPER. 

